https://bugs.llvm.org/show_bug.cgi?id=37004

            Bug ID: 37004
           Summary: assertion failure in induction variable simplification
                    with zext
           Product: new-bugs
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
          Assignee: unassignedb...@nondot.org
          Reporter: eric.schwe...@pgroup.com
                CC: llvm-bugs@lists.llvm.org

Created attachment 20157
  --> https://bugs.llvm.org/attachment.cgi?id=20157&action=edit
reduced test

Originally found on Power, but get same behavior with X86.

% opt bugpoint-reduced-simplified.bc -indvars -o /dev/null
...
Stack dump:
0.      Program arguments: opt bugpoint-reduced-simplified.bc -indvars -o
/dev/null 
1.      Running pass 'Function Pass Manager' on module
'bugpoint-reduced-simplified.bc'.
2.      Running pass 'Loop Pass Manager' on function '@bug'
3.      Running pass 'Induction Variable Simplification' on basic block
'%L.B0155'
Segmentation fault

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